88566921 has 9 divisors (see below), whose sum is σ = 127970791. Its totient is φ = 59025792.

The previous prime is 88566887. The next prime is 88566931. The reversal of 88566921 is 12966588.

The square root of 88566921 is 9411.

It is a perfect power (a square), and thus also a powerful number.

88566921 is a `hidden beast` number, since 88 + 566 + 9 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 88454025 + 112896 = 9405^2 + 336^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 88566921 - 2⁹ = 88566409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88566931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26665 + ... + 29801.

Almost surely, 2^88566921 is an apocalyptic number.

88566921 is the 9411-st square number.

88566921 is the 4706-th centered octagonal number.

It is an amenable number.

88566921 is a deficient number, since it is larger than the sum of its proper divisors (39403870).

88566921 is an frugal number, since it uses more digits than its factorization.

88566921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6280 (or 3140 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The cubic root of 88566921 is about 445.7491417074.

It can be divided in two parts, 88 and 566921, that added together give a square (567009 = 753²).

The spelling of 88566921 in words is "eighty-eight million, five hundred sixty-six thousand, nine hundred twenty-one".